System and method for training and monitoring data reader operators

ABSTRACT

A scanner or other data reader is equipped with means for determining characteristics of an operator&#39;s scanning technique. In a preferred configuration, the scanner is integrated with a weigh scale for obtaining a dynamic weight of an item as the item is moved across the weigh scale. Weight data produced by the scanning/weighing process includes information about the amount of lifting the operator performs on scanned items, the rate of scanning by the operator, and rescanning information. The scanner may be connected to a PC-based training system which uses the scanning technique information to provide feedback to the operator indicating the effectiveness of the operator&#39;s scanning technique, and may also provide information to management for analysis. The technique information may be collected by a store controller or other suitable collection device for later analysis and reporting.

RELATED APPLICATIONS

This application is a continuation of application Ser. No. 09/976,839filed Oct. 12, 2001, which claims priority to provisional applicationSer. No. 60/241,300 filed Oct. 17, 2000, each of these applicationsbeing hereby incorporated by reference.

BACKGROUND

The field of the present invention relates to data reading systems, suchas barcode scanners, and methods for operating such systems.

Typically, fixed scanners are installed in a retail checkstandenvironment for scanning items. Customers gather items for purchase andtransport their items to the checkstand. Items are either (1) placed ona counter, with the operator scanning the items; (2) brought to theoperator in a basket, whereby the operator takes the items directly fromthe basket and scans them; or (3) placed on a conveyor system whichtransports the items to the operator, whereby the operator scans theitems. The items are either scanned by moving them through (orpresenting them to) the scan field of a fixed scanner or, in the case ofa handheld scanner, the operator aims the scanner at the barcode andscans it.

In order to maximize throughput speed and minimize physical stress,operators may receive training on scanner operation. Further, theoperator may become familiar with the operation of the scanner by trialand error, for example, by adjusting the distance an item is spaced fromthe scan window during scanning to provide the most consistentfirst-time reads. Existing systems may also include a monitoring systemfor measuring the scanning rate of the operator.

SUMMARY

The present invention is directed to a system and method for trainingand monitoring a data reader operator. The system comprises a datareader for gathering information about an operator's scanning technique,a PC-based training device that receives the information from the datareader for the purpose of training the operator, and a point-of-sale(POS) device that receives the information for the purpose of monitoringoperator scanning technique during normal use. In a preferredembodiment, the data reader may be integrated with a weigh scale forobtaining a dynamic weight of an item as the item is moved across theweigh scale. Weight data produced by the scanning/weighing processincludes information about the amount of lifting the operator performson scanned items, the rate of scanning by the operator, and rescanninginformation. The system provides feedback to the operator indicating theeffectiveness of the operator's scanning technique, and may also provideinformation to store management for analysis. As a result, the systemassists the operator in using the data reader in a more ergonomic and/orefficient manner.

In another embodiment, the data reader is equipped with a visualfeedback display positioned on the data reader housing in ahigh-visibility location. The feedback display provides a visual readout(i.e. the feedback) in a graphical format indicating, for example, theeffectiveness of the operator's scanning technique.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagrammatic perspective view of a fixed scanner/scaleaccording to a first embodiment.

FIG. 2 is a diagrammatic perspective view of the fixed scanner of FIG. 1connected to a PC for implementing a training mode.

FIG. 3 is a diagrammatic perspective view of the fixed scanner of FIG. 1connected to a POS terminal for implementing a monitor mode.

FIG. 4 is a flowchart illustrating the steps followed in the trainingmode of FIG. 2.

FIG. 5 is a flowchart illustrating the steps followed in the monitormode of FIG. 3.

FIG. 6 is a diagrammatic perspective view of a scanning system employingcameras for detecting scan motion.

FIG. 7 is a diagrammatic perspective view of a scanner according to analternative embodiment.

FIG. 8 is an illustration of a first operation mode of the scanner ofFIG. 7.

FIG. 9 is an illustration of a second operation mode of the scanner ofFIG. 8.

FIG. 10 is a diagrammatic perspective view of the fixed scanner of FIG.1 employing two visual feedback displays.

FIG. 11 is a diagrammatic, front left perspective view of a handheldscanner according to an alternative embodiment.

FIG. 12 is a diagrammatic, rear right perspective view of the handheldscanner of FIG. 11.

FIG. 13 is a diagrammatic perspective view of a scanner with a displaymodule attached thereto.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The preferred embodiments will now be described with reference to thedrawings. To facilitate description, element numerals designating anelement in one figure will represent the same element in any otherfigure.

A data reader, as defined herein, is primarily described as a barcodelaser scanner in which a laser beam is scanned to produce one or morescan lines for reading a barcode. The data reader may alternatelycomprise any suitable data reading device such as a CCD imaging datareader, LED reader, CMOS imaging reader, RFID reader, EAS deactivationdevice, or the like. Other types of reading devices may include securitydevices such as X-ray or metal detector machines such as those used inairport and building entry security. Though the following examples willgenerally be described with respect to typical barcode scanners used inthe retail environment, it will be understood that the disclosed systemsand methods may be applied to any suitable reading devices wherein anoperator moves, or “scans,” an item through the read volume of the datareading device.

FIG. 1 illustrates a multi-window scanner 40 similar in configuration tothe Magellan® scanner-scale manufactured by PSC Scanning, Inc. ofEugene, Oreg. The scanner 40 includes a housing 42 having an upperhousing section containing a vertical window 44 and a lower housingsection containing a weigh platter 41 and a horizontal window 46. Afeedback display 48 may be positioned on the housing 42 at ahigh-visibility location relative to an operator, illustrated on theupper housing section next to the vertical window 44. The feedbackdisplay 48 is described in greater detail below.

The scanner 40 has a field of view out through scanner windows 44, 46.The scanner 40 projects a scan pattern comprising one or more scan linesout through the windows 44, 46 for reading barcodes presented or passedthrough the scan volume. The scanner may read 1-D or 2-D optical codes,product identification, fingerprint ID, or other items such as might berequired to be scanned in a retail environment or in securityapplications.

In another embodiment, a Radio Frequency Identification (RFID) readingdevice may be used to activate and collect data from RFID tags placed onitems. An RFID tag is a normally passive device, but when activated orprompted by a signal from an interrogator, the RFID tag emits a signalwith its information to a receiving device. The process of scanningRFID-tagged items is essentially identical to that of scanning barcodeditems. In both cases, the item with a tag bearing the information to becaptured is brought near or scanned past a compatible reading device toobtain data relating to the item.

The scanner 40 may also be equipped with Electronic Article Surveillance(EAS) equipment, which may be integrated with the scanner 40 or placedin the immediate vicinity thereof. EAS tags are placed on items for thepurpose of theft prevention. At the time of purchase, the EAS tag on anitem is deactivated so that it will not trigger detection devices placedat store exits. The deactivation equipment is preferably in very closeproximity to or integrated with the scanner 40, and is used as part ofthe overall scanning process. In a typical form, the deactivationequipment is triggered by a “good read” signal from the scanner 40.

The scanner 40 is provided with a “training mode” in which a special setof items, encoded with identified data, are used to gather informationabout the operator's scanning technique. Training occurs via a softwareapplication based in a personal computer (PC) 43, as shown in FIG. 2,which communicates with the scanner 40 via connection to a PC-port 45 onthe scanner housing 42.

The software application utilizes scanning technique informationreceived from the scanner 40 to evaluate the effectiveness of anoperator's scanning technique. The application may also display scanninginstructions on a video monitor 49 of the PC 43, including animationsand videos of proper scanning techniques, and may also broadcast audiodescriptions/instructions. The instructions are preferably tailored toan individual operator based upon data received from the scanner 40after the operator has scanned a certain number of specific items.

The application running on the PC 43 may provide information and reportsabout scanning techniques to the operator, as well as to storemanagement, along with suggestions for technique improvements. Thescanner 40 in the training mode may be located in a customary POScheckstand, or may be located in a special training area away from theusual transactional setting.

In another embodiment, hereinafter referred to as the “monitor mode,”the scanner 40 continuously monitors the scanning technique of anoperator based upon items scanned that are purchased by customers. Inthis embodiment, the scanner 40 is used in its normal configuration in acheckstand with connection to a POS system 50 via a POS port 47, asshown in FIG. 3. The scanner 40 provides scanning technique informationto the POS system 50, which may then provide the information to acentral system location for management evaluation.

In order to measure the scanning technique of the operator, the scanner40 first determines one or more of the following barcodeorientation/movement data: which scanner window the barcode data camefrom which scan line or lines were used to read the barcode; distance ofthe barcode from the scanner; how long the barcoded item was present inthe scan volume before complete decoding occurred (i.e., how long thebar code was present in the scan volume after initial detection by thescanner before a complete barcode scan occurred); or how many pieces ofbarcode data were assembled to decode the data. From this data,inferences about the operator's scanning technique can be formed, andfeedback can then be supplied to the operator and/or to storemanagement.

The scanner 40 may also be used to instruct operators on the proper useof EAS equipment. The EAS deactivation process is not 100% reliable,partly due to poor operator scanning technique. If, for example, theoperator is too quick in moving the product through the deactivationzone, the EAS tag may remain active. The failure of an EAS tag todeactivate has serious consequences. A customer may be stopped by alarmsat a store exit, inconvenienced, embarrassed, or even falsely accused oftheft.

The problem of scanner operators failing to properly deactivate EAS tagsmay be minimized by teaching operators proper scanning technique.Accordingly, the training mode described above may further be used toinstruct operators on the proper use of EAS equipment. In thisembodiment, the identified training items include items having EAS tagswhich are used for deactivation practice. The EAS deactivation systempreferably includes means, such as a sensing antenna, to determine if anactive EAS tag is present. Thus, after a training run, an operator maypass the scanned items back across the EAS sensing antenna to determinehow many items are still active, and thus, how many items were notproperly deactivated.

The EAS system may also sense how long an EAS tag is present in thedeactivation volume during the training run, and thereby determine theapproximate speed at which an item was moved through the deactivationvolume. Based upon this measurement, the system could provide feedbackto the operator on how to improve item movement technique.

In another embodiment, the training items may be outfitted withnon-deactivatable EAS tags. Accordingly, the entrance to and exit fromthe deactivation volume, as well as the amount of time an item remainsin the deactivation volume, may be measured by the active tag sensingmeans. This item presence and time data, coinciding with when theoperator attempts to read the item data with the scanner 40, may be usedfor determining scanning technique effectiveness.

In a preferred embodiment, a weigh scale having a weigh platter 41 isintegrated with the scanner 40 to determine the amount of liftingperformed by a scanner operator. An important aspect of proper ergonomictechnique during scanning is the minimization of lifting. Thus,providing feedback relating to the amount of lifting performed isbeneficial to the physical well being of the operator.

The weigh platter 41 is used for weighing items priced by weight and forobtaining the “dynamic weight” of items. The dynamic weight of an itemis the weight registered by the weigh platter 41 as the item is movedacross the surface of the weigh platter 41 during scanning. When anoperator scans a heavy item, he/she preferably slides the item throughthe scan zone, rather than lifting the item. As an item is draggedacross the weigh platter, the item is in contact with the weigh platterfor a period of time as it is moved.

For a particular item, this motion may be analyzed to determine apreferred dragging motion, and from that analysis, to obtain an optimumpartial weight value or an optimum dynamic weight output (the output mayactually be a preferred weight operation function) to ascertain apreferred weight operation function for that item. The optimum partialweight or optimum dynamic weight of the item may then be stored in alookup table for future comparison during scanning, and/or may be sentto the POS terminal as additional data along with the normal barcodedata.

The lookup table preferably contains weight data for commonly purchaseditems which are either heavy or are the type of items that are morelikely to require manipulation by the operator, that is, items which aremost likely to lead to higher exertion or repetitive motion injuries.The lookup table may reside in the scanner 40 or in the trainingapplication. When an operator scans such an item, the lookup table isaccessed and item weight data or a preferred weight operation functionobtained from the lookup table is compared to the dynamic weight orweight operation function of the item registered by the weigh platter41. Feedback may then be displayed to the operator and/or storemanagement, reflecting the closeness of the preferred weight to the scanweight, or closeness to an optimum dragging motion in one or more of theforms described above.

If the dynamic weight closely approximates the partial weight or theoptimum dynamic weight of the item, this feedback indicates that theweigh platter 41 is bearing most of the load and that the operator ispracticing proper scanning technique. If, on the other hand, the dynamicweight differs substantially from the weight expected for the item, thisfeedback indicates that the weigh platter 41 is likely not bearing thebulk of the load and that the operator is performing unnecessary liftingthat could lead to repetitive motion injuries.

In an alternative embodiment, the scanner may compute the averagedynamic weight of items scanned over an extended period of time, such asthe duration of a scanner operator's work shift. The average dynamicweight may then be sent to the POS terminal upon receipt of a suitablecommand, where it may be compared to an average weight standard todetermine whether the operator is likely to be performing more liftingthan is recommended. The average weight standard reflects an expectedaverage weight that is obtained when many items are scanned over anextended period of time. The average weight standard may be establishedthrough trial and error, through evaluating several operators over aperiod of time who utilize proper scanning technique, or through someother suitable method. Feedback may then be provided to the operatorreflecting the closeness of the average weight standard to the averagedynamic weight of the scanned items, in one or more of the formsdescribed above. The average dynamic weight that is sent to a POSterminal or other data collection system may also be used for thepurpose of reporting the average dynamic weight to store management foranalysis.

Various other types of information about scanning technique may beobtained from weight data obtained from the weigh platter 41. When anitem is moved across the weigh platter 41, a weight pulse is producedsignifying the duration of time that the item is present on the weighplatter 41. Inferences may be made about stress on the operator's bodybased upon the weight of the item and how fast the item is moved acrossthe weigh platter 41 (heavier items should be moved more slowly). Thus,when a heavy item is moved quickly across the weigh platter 41, theweight pulse produced will be relatively short, indicating that theoperator is moving the heavy item too quickly through the scan zone,which could lead to repetitive motion injuries.

Additionally, ease of scanning, and the occurrence of rescanning, may bedetermined by the time within the weight pulse at which a good read ofan item occurs. When an item is scanned easily, the good read willoccur, on average, near the middle of the weight pulse. If, on the otherhand, a good read does not occur as the item is initially moved acrossthe weigh platter 41, a rescan is required. Rescanning is the processwherein the item enters the scan volume of the scanner at a typicalscanning speed, a good read does not occur initially, and the item musttherefore be moved around on the weigh platter 41 in an attempt toobtain a good read. Once a good read is obtained, the item is moved offof the weigh platter 41 fairly quickly. Thus, the good read occurs nearthe end of the weight pulse, since the item remained on the weighplatter 41 for a relatively long period of time before the good readoccurred, and the item was then quickly removed from the weigh platter41. This rescanning occurrence information may be provided as feedbackto the operator for the purpose of improving scanning technique, and mayalso be sent to a POS terminal or other data collection system foranalysis by store management.

In monitoring lifting in monitor mode, dynamic weight of each item maybe sent to the store system along with the customary item identificationdata. By statistical analysis of dynamic weight and scan technique dataper operator, inferences about training effectiveness may be obtained.

The same ergonomic considerations that apply to scanning barcoded itemsapply to scanning RFID-tagged items as well. With RFID scanning,however, the need to twist and rotate items to read data is eliminated,because the RFID tag sends out an omni-directional signal, which is readby the RFID reading device regardless of the orientation of the item andthe RFID tag. Accordingly, determining which scanner window reads theRFID information is irrelevant to determining proper scanning technique.The tendency of operators to lift items improperly is still present,however, and the same dynamic weight data used in barcode scanning maybe used when monitoring RFID scanning. Thus, a weigh scale device may beused in conjunction with an RFID reader to obtain operator lifting datain a manner similar to that used with a barcode scanner/scale.

FIGS. 4 and 5 are flowcharts illustrating the training and monitormodes, respectively. In both modes, an operator passes an item throughthe scan volume of the scanner 40 so that the scanner 40 reads a barcodeaffixed to the item. Additionally, if the item is moved across the weighplatter 41, the weigh scale measures a dynamic weight of the item. Thescanner 40 then determines the barcode orientation/movement data and theweight profile data, hereinafter referred to collectively as thescanner/scale data, as described above.

In the training mode illustrated by the flowchart of FIG. 4, the PCsoftware application logs the scanner/scale data in a performancedatabase for evaluation by management. The PC application may alsoprovide real-time scanning technique feedback to the operator via thevideo monitor 49, or any other suitable means. This process continuesuntil the last training item is scanned, after which, the PC applicationevaluates the operator's performance and provides a review of theoperator's scanning technique to the operator and/or to the performancedatabase. The review may include information describing flaws in theoperator's scanning technique, suggestions on how to improve scanningtechnique, or any other suitable feedback data.

In the monitor mode of FIG. 5, the scanner 40 sends the scanner/scaledata, along with the barcode item identification data, to the POSterminal 50. The POS terminal 50 collects or directly sends thescanner/scale data to a collection computer, which assembles the dataand provides reports to store management. The reports may includescanning technique data for specific operators, or specific checkoutlanes, or for any other relevant criteria requested by management.

In another embodiment, actual scan motion is monitored to evaluate anoperator's scanning technique. FIG. 6 illustrates a system 100 with oneor more cameras 102 or sensors which detect motion of items as theoperator passes them through the scan volume. The signal from thecameras is sent to a processor, such as via a suitable machine visionprogram, which analyzes the motion of the item (or the operator's hands)to determine how the item was moved through the scan volume, i.e., if itwas lifted rather than dragged, or if it was twisted, or how long theitem was in the scan volume before a successful scan occurred.

The use of multiple cameras may be preferred to the use of a singlecamera, because multiple camera views may be triangulated with oneanother (as shown by the dashed lines in FIG. 6), thereby producing amore thorough depiction of an operator's scanning technique. Since theidentity of the item is known once it is scanned, the motion detectedmay be compared to a preferred or typical motion from the lookup tableand feedback may be provided to the operator on how efficiently theoperator moved the item through the scan volume via one of the displaysystems described above.

Reports, reviews, and evaluations of operator scanning technique may beproduced as hard copy reports from a printer and/or may be displayed ona video monitor, such as PC monitor 49. Additionally, real-time feedbackmay be provided to the operator in graphical form via the visualfeedback display 48. The visual feedback display 48 may be incorporatedinto the scanner 40, as shown in FIG. 1, or may be incorporated into anyother suitable scanning system.

FIGS. 7-9 illustrate a scanner 10 having a visual feedback display 20that provides a visual readout (feedback) in a bar-graph format, in thisinstance, in an incremental format. The graphical display 20 includes aplurality of lamps 22 a-22 g which are lighted depending upon, forexample, the effectiveness and/or efficiency of the operator's scanningtechnique, as described above. In the display 20 a of FIG. 8, the bars22 g, 22 f are fully lighted, the bars 22 b, 22 c, 22 d, 22 e arepartially lighted, and the bar 22 a is unlighted indicating that thescan technique was poor. In the display 20 b of FIG. 9, all but bar 22 ais fully lighted indicating that the scanning technique was good. Theopposite methodology could also be followed, wherein the bars 22 couldbe lighted, in red for example, for a poor read, and not at all (oroptionally in green) for a good read. Additionally, the lamps 22 a-22 gcould light from left to right, as opposed to from right to left asshown.

The bars 22 a-22 g may light in a single color and intensity, or eachbar may have a different color, or each bar may have the ability tochange color thereby individually alighting in different colors. Forexample, bars 22 g-22 f may first light yellow, and then change to redif bars 22 e-22 d are also lighted.

The preferred color and graphical scheme is preferably one in which thefeedback to the operator is highly intuitive. For example, via testing,it may be determined that a user intuitively associates the color green(green means “go”) with successful reading operation. In that case ifthe system interprets a good operating technique, a green display may beinitiated. If the system interprets a poor operating technique, a reddisplay (red means “stop”) may be initiated. Alternately, the display 20may comprise a single bar changing colors, from green to red forexample, to signify output value. Alternately, the display 20 mayprovide alphanumeric readout, e.g. displaying numbers 1 through 10, withhigher numbers indicating a superior operation.

For a scanner with the indicators mounted on a horizontal surfacethereof, the row of bars is preferably oriented parallel to thedirection of, and not directly under, the path of scanned item flow sothat neither the operator's hands nor the items scanned will obscure thedisplay during scanning. For example, if the direction of scanning isfrom left to right, as illustrated in FIGS. 8-9, the operator ispreferably positioned at the bottom of the scanner, and items are passedfrom left to right across the window 14.

In a preferred embodiment, the system provides feedback to the operatorthat assists the operator in using the scanner in a more ergonomicand/or efficient manner, as described above. The scanner display 20provides information to the operator by visual and/or audiblemechanisms.

Forms of visual feedback could be, for example, lamps of various colorsor which are arranged in sequential rows (as in the “bar graph” typedisplay), or a video display with graphical or textual information aboutthe operator's scanning technique. Audible feedback may include specialsounds which indicate how properly the operator is scanning. The normal“good read” tone may be adjusted in pitch, duration, or othercharacteristic to provide the feedback information.

The feedback may comprise audible tones that could vary in pitch and/orvolume to provide specific feedback information to the operator. Theaudible system may be preferred in training because the visual aspectcould be distracting. The scanner may be connected to a dedicated PC orcontroller for training purposes.

In an alternative embodiment, as shown in FIG. 10, a scanner 40′integrated with a weigh platter 41 may include a second visual feedbackdisplay 48′ for providing feedback relating to the operator's liftingtechnique separately from other scanning feedback data. The otherscanning feedback data may then be provided via the first visualfeedback display 48.

FIGS. 11-12 illustrate a handheld scanner 60 similar in configuration tothe PowerScan™ scanner manufactured by PSC Scanning, Inc. of Eugene,Oreg. The scanner includes a housing comprised of a scan head section 64and a handle section 66. A trigger 68 is positioned on the handle 66 foroperation. A visual display 70 is positioned on the top of the scan headsection 64. The display 70 includes a continuous bar graph indicatorwhich can provide feedback to the operator such as previously described.Additionally in the handheld environment, the feedback could also relateto (a) distance to object being scanned; (b) excessive motion, i.e.operation technique is not sufficiently steady; (c) trigger operation;or (d) aiming operation. For example, the scanner may include a velocitysensor or an accelerometer 76, mounted to or integrated into the scannerPCB 74 (both shown schematically by dashed lines in FIG. 12), whichmonitors motion of the scanner. By analyzing motion of the scanner at oraround the time that a barcode is read, excessive motion may bedetermined and appropriate feedback may be provided to the operator.

The display 70 may also be aligned along the trop of the scan headsection 64 along the line of sight which provides for a highly visiblelocation and may also serve to assist in aiming of the scanner 70.

The feedback system and graphical display may be incorporated into thescanner housing 80 itself, or it may comprise an add-on module 82, asshown in FIG. 13, mounted to the housing 81 of a scanner 80. In such asystem, the module 82 may include a cord 84 which is connected to a port86 on the scanner 80 for obtaining the scan and/or weight informationfor performing the analysis. The module 82 is removable and thus may beonly temporarily connected to the scanner 80. The module 82 may compriseonly the visual display 88, with processing being handled by a separatecomputer. For example, the module may be connected to a notebookcomputer 90, the computer 90 including suitable feedback analysissoftware. The notebook computer 90 is also connected to a port 92 on thescanner 80 for receiving the scanning and/or weight information.

Benefits of the various embodiments described herein may include one ormore of the following: (a) improved operator productivity and scanningtechnique, (b) reduction in physical stress on the operator thusreducing repetitive motion injuries, (c) continuous improvementfeedback, and (d) reports to management about operator technique.

Thus while embodiments and applications of the present invention havebeen shown and described, it would be apparent to one skilled in the artthat other modifications are possible without departing from theinventive concepts herein. The invention, therefore, is not to berestricted except in the spirit of the claims that follow.

1-36. (canceled)
 37. A data acquisition system comprising a data readerfor reading tags on items being moved through a read region; a weighscale, including a weigh platter, integrated with the data reader, theweigh platter being positioned generally below the read region; aprocessor for determining an effectiveness of a reading technique basedupon a combination of input from the data reader and the weigh scale.38. The data acquisition system of claim 37 further comprising a camerafor monitoring motion of the item during movement through the readregion.
 39. The data acquisition system of claim 37 feedback means incommunication with the processor for providing feedback indicating theeffectiveness of the reading technique.
 40. The data acquisition systemof claim 39 wherein the feedback means comprises a printer for printinga reading technique report.
 41. The data acquisition system of claim 39wherein the feedback means comprises a video monitor for displayingreading technique data.
 42. The data acquisition system of claim 39wherein the data reader includes a housing and wherein the feedbackmeans comprises a visual feedback display located on the housing. 43.The data acquisition system of claim 39 wherein the feedback meanscomprises audible feedback.
 44. The data acquisition system of claim 43wherein the audible feedback includes a plurality of different soundsindicating how properly an operator is moving items through the readregion.